zero组件
<br />
<span #mySpan
  >父组件的count:
  <button class="btn" (click)="btnClick()">{{ count }}</button>
  <br>
  <button (click)="printRef()">打印子元素及子组件的ref</button>
</span>
<hr />
<app-pink
  #pinkCpn
  [sonCount]="count"
  [deleteClick]="deleteClick"
  (deleteEvent)="deleteClick()"
  (parmasEvent)="parmasEventHandler($event)"
></app-pink>
